:root{
  font-size: 12px;
}
body{
  padding: 8px;
}
/* 默认的高亮clas类 */
.router-link-active {
  background-color: red;
  color: white;
  font-weight: bold;
}
/* 自定义路由高亮的 class 类 */
.active-router{
  background-color: blue;
  color: white;
  font-weight: bold;
}